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Day17 表单验证、滚动菜单、Django
一、表单验证的两种实现方式
1、DOM绑定
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>表单验证(DOM绑定)</title> <style> .item{ width: 250px; height: 60px; position: relative; } .item input{ width: 200px; } .item span{ position: absolute; top: 20px; left: 0px; font-size: 8px; background-color: red; color: white; display: inline-block; width: 200px; } </style> </head> <body> <div> <form> <div class="item"> <input class="c1" type="text" name="username" label="用户名" /> <!--<span>用户名不能为空</span>--> </div> <div class="item"> <input class="c1" type="password" name="pwd" label="密码" /> <!--<span>密码不能为空</span>--> </div> <input type="submit" value="提交" onclick="return CheckValid();" /> <!--<input type="submit" value="http://www.mamicode.com/提交" />--> </form> </div> <script src="jquery-1.12.4.js"></script> <script> function CheckValid() { //找到form标签下的所有需要验证的标签 //$(‘form .c1‘) //$(‘form input[type="text"],form input[type="password"]‘) //循环所有需要验证的标签,获取内容 //移除错误提示 $(‘form .item span‘).remove(); var flag = true; $(‘form .c1‘).each(function () { //每一个元素执行一次匿名函数 //this:当前元素 //console.log(this,$(this)); var val = $(this).val(); if(val.length <=0){ var label = $(this).attr(‘label‘); var tag = document.createElement(‘span‘); tag.innerText = label + "不能为空"; $(this).after(tag); flag = false; } }); return flag; } </script> </body> </html>
2、jQuery绑定
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>表单验证(jQuery绑定)</title> <style> .item{ width: 250px; height: 60px; position: relative; } .item input{ width: 200px; } .item span{ position: absolute; top: 20px; left: 0px; font-size: 8px; background-color: red; color: white; display: inline-block; width: 200px; } </style> </head> <body> <div> <form> <div class="item"> <input class="c1" type="text" name="username" label="用户名" /> <!--<span>用户名不能为空</span>--> </div> <div class="item"> <input class="c1" type="password" name="pwd" label="密码" /> <!--<span>密码不能为空</span>--> </div> <input type="submit" value="提交" /> </form> </div> <script src="jquery-1.12.4.js"></script> <script> $(function(){ //当页面加载完成后自动执行 BindCheckValid(); }); function BindCheckValid() { $(‘form :submit‘).click(function() { //只要点击submit按钮,执行此处内容,找到form标签下的所有需要验证的标签 $(‘form .item span‘).remove(); var flag = true; $(‘form .c1‘).each(function () { //每一个元素执行一次匿名函数 //this:当前元素 //console.log(this,$(this)); var val = $(this).val(); if (val.length <= 0) { var label = $(this).attr(‘label‘); var tag = document.createElement(‘span‘); tag.innerText = label + "不能为空"; $(this).after(tag); flag = false; return false; } }); return flag; }); } </script> </body> </html>
二、jQuery补充
1、jQuery中each返回值
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>jQuery中each返回值</title> <style> .item{ width: 250px; height: 60px; position: relative; } .item input{ width: 200px; } .item span{ position: absolute; top: 20px; left: 0px; font-size: 8px; background-color: indianred; color: white; display: inline-block; width: 200px; } </style> </head> <body> <div> <form> <div class="item"> <input class="c1" type="text" name="username" label="用户名"/> <!--<span>用户名不能为空</span>--> </div> <div class="item"> <input class="c1" type="password" name="pwd" label="密码"/> <!--<span>密码不能为空</span>--> </div> <!--<input type="submit" value="http://www.mamicode.com/提交" onclick="return CheckValid();" />--> <input type="submit" value="提交" /> </form> </div> <script src="jquery-1.12.4.js"></script> <script> function BindCheckValid(){ $.each([11,22,33,44],function(k,v){ if(v == 22){ //return ; // continue return false; //break } console.log(v); }) } BindCheckValid(); </script> </body> </html>
2、jQuery扩展
扩展1:
extend1.js
/** * Created by WangHuafeng on 2016/10/15. */ (function (jq) { jq.extend({ ‘radar‘ : function (arg) { console.log(arg); } }); function f1() { } })(jQuery); //1、自执行;2、闭包 /* a = function (jq) { //调用时没有选择器 jq.extend({ ‘radar‘ : function (arg) { console.log(arg); } }); function f1() { } }; a(jQuery); */
extend1.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>jQuery扩展1</title> <style> .item{ width: 250px; height: 60px; position: relative; } .item input{ width: 200px; } .item span{ position: absolute; top: 20px; left: 0px; font-size: 8px; background-color: indianred; color: white; display: inline-block; width: 200px; } </style> </head> <body> <div> <form> <div class="item"> <input class="c1" type="text" name="username" label="用户名"/> <!--<span>用户名不能为空</span>--> </div> <div class="item"> <input class="c1" type="password" name="pwd" label="密码"/> <!--<span>密码不能为空</span>--> </div> <!--<input type="submit" value="http://www.mamicode.com/提交" onclick="return CheckValid();" />--> <input type="submit" value="提交" /> </form> </div> <script src="jquery-1.12.4.js"></script> <script src="extend1.js"></script> <script> $.radar(‘welcome radar 扩展1‘); </script> </body> </html>
扩展2:
extend2.js
/** * Created by WangHuafeng on 2016/10/15. */ (function (jq) { //调用的时候可以有选择器 $.fn.extend({ ‘radar1‘ : function (arg) { //this:代指前面的选择器 console.log(arg); } }); function f2() { } })(jQuery); /* b = function () { //调用的时候可以有选择器 $.fn.extend({ ‘radar1‘ : function (arg) { //this:代指前面的选择器 console.log(arg); } }); function f2() { } }; b(jQuery); */
extend2.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>jQuery扩展2</title> <style> .item{ width: 250px; height: 60px; position: relative; } .item input{ width: 200px; } .item span{ position: absolute; top: 20px; left: 0px; font-size: 8px; background-color: indianred; color: white; display: inline-block; width: 200px; } </style> </head> <body> <div> <form> <div class="item"> <input class="c1" type="text" name="username" label="用户名"/> <!--<span>用户名不能为空</span>--> </div> <div class="item"> <input class="c1" type="password" name="pwd" label="密码"/> <!--<span>密码不能为空</span>--> </div> <!--<input type="submit" value="http://www.mamicode.com/提交" onclick="return CheckValid();" />--> <input type="submit" value="提交" /> </form> </div> <script src="jquery-1.12.4.js"></script> <script src="extend2.js"></script> <script> $(‘form‘).radar1(‘welcome radar1 扩展2‘); </script> </body> </html>
3、表单验证jQuery扩展
commons.js
/** * Created by WangHuafeng on 2016/10/15. */ (function (jq) { jq.extend({ valid:function (form) { //#form1 $(‘#form1‘) jq(form).find(‘:submit‘).click(function () { jq(form).find(‘.item span‘).remove(); var flag = true; jq(form).find(‘:text,:password‘).each(function () { var val = $(this).val(); if (val.length <= 0) { var label = $(this).attr(‘label‘); var tag = document.createElement(‘span‘); tag.innerText = label + "不能为空"; $(this).after(tag); flag = false; return false;//相当于break } }); return flag; }); } }); })(jQuery);
j1.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>表单验证(jQuery扩展)</title> <style> .item{ width: 250px; height: 60px; position: relative; } .item input{ width: 200px; } .item span{ position: absolute; top: 20px; left: 0px; font-size: 8px; background-color: red; color: white; display: inline-block; width: 200px; } </style> </head> <body> <div> <form id="form1"> <div class="item"> <input class="c1" type="text" name="username" label="用户名" /> </div> <div class="item"> <input class="c1" type="password" name="pwd" label="密码" /> </div> <input type="submit" value="提交" /> </form> <form id="form2"> <div class="item"> <input class="c1" type="text" name="username" label="用户名" /> </div> <div class="item"> <input class="c1" type="password" name="pwd" label="密码" /> </div> <input type="submit" value="提交" /> </form> </div> <script src="jquery-1.12.4.js"></script> <script src="commons.js"></script> <script> $(function () { $.valid(‘#form1‘); //valid:$(‘#form1‘) }); </script> </body> </html>
4、表单验证自定义属性
commons2.js
/** * Created by WangHuafeng on 2016/10/15. */ (function (jq) { function ErrorMessage(inp,message) { var tag = document.createElement(‘span‘); tag.innerText = message; inp.after(tag); } jq.extend({ valid:function (form) { jq(form).find(‘:submit‘).click(function () { jq(form).find(‘.item span‘).remove(); var flag = true; jq(form).find(‘:text,:password‘).each(function () { var require = $(this).attr(‘require‘); if(require){ var val = $(this).val(); if (val.length <= 0) { var label = $(this).attr(‘label‘); ErrorMessage($(this),label + "不能为空"); flag = false; return false;//相当于break } var minLen = $(this).attr(‘min-len‘); if(minLen){ var minLenInt = parseInt(minLen); if(val.length<minLenInt){ var label = $(this).attr(‘label‘); ErrorMessage($(this),label + "最小长度为"+ minLen); flag = false; return false;//相当于break } //json.stringfy() //JSON.parse() 字典转换为字符串 } var phone = $(this).attr(‘phone‘); if(phone){ //用户输入内容是否为手机号码格式 var phoneReg = /^1[3|5|8]\d{9}$/; if(!phoneReg.test(val)){ var label = $(this).attr(‘label‘); ErrorMessage($(this),label + "格式错误"); flag = false; return false;//相当于break } } //自定义标签格式 //验证 } }); return flag; }); } }); })(jQuery);
j2.html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>表单验证(自定义属性)</title> <style> .item{ width: 250px; height: 60px; position: relative; } .item input{ width: 200px; } .item span{ position: absolute; top: 20px; left: 0px; font-size: 8px; background-color: red; color: white; display: inline-block; width: 200px; } </style> </head> <body> <div> <form id="form1"> <div class="item"> <input class="c1" type="text" name="username" label="用户名" require="true" min-len="6" /> </div> <div class="item"> <input class="c1" type="password" name="pwd" label="密码" /> </div> <div class="item"> <input class="c1" type="text" name="tel" label="手机号码" require="true" phone="true" /> </div> <input type="submit" value="提交" /> </form> </div> <script src="jquery-1.12.4.js"></script> <script src="commons2.js"></script> <script> $(function () { $.valid(‘#form1‘); //valid:$(‘#form1‘) }); </script> </body> </html>
三、滚动菜单
scroll_menu.html
<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> body{ margin: 0px; } img { border: 0; } ul{ padding: 0; margin: 0; list-style: none; } .clearfix:after { content: "."; display: block; height: 0; clear: both; visibility: hidden; } .wrap{ width: 980px; margin: 0 auto; } .pg-header{ background-color: #303a40; -webkit-box-shadow: 0 2px 5px rgba(0,0,0,.2); -moz-box-shadow: 0 2px 5px rgba(0,0,0,.2); box-shadow: 0 2px 5px rgba(0,0,0,.2); } .pg-header .logo{ float: left; padding:5px 10px 5px 0px; } .pg-header .logo img{ vertical-align: middle; width: 110px; height: 40px; } .pg-header .nav{ line-height: 50px; } .pg-header .nav ul li{ float: left; } .pg-header .nav ul li a{ display: block; color: #ccc; padding: 0 20px; text-decoration: none; font-size: 14px; } .pg-header .nav ul li a:hover{ color: #fff; background-color: #425a66; } .pg-body{ } .pg-body .catalog{ position: absolute; top:60px; width: 200px; background-color: #fafafa; bottom: 0px; } .pg-body .catalog.fixed{ position: fixed; top:10px; } .pg-body .catalog .catalog-item.active{ color: #fff; background-color: #425a66; } .pg-body .content{ position: absolute; top:60px; width: 700px; margin-left: 210px; background-color: #fafafa; overflow: auto; } .pg-body .content .section{ height: 500px; } </style> </head> <body> <div class="pg-header"> <div class="wrap clearfix"> <div class="logo"> <a href="#"> <img src=""> </a> </div> <div class="nav"> <ul> <li> <a href="#">首页</a> </li> <li> <a href="#">功能一</a> </li> <li> <a href="#">功能二</a> </li> </ul> </div> </div> </div> <div class="pg-body"> <div class="wrap"> <div class="catalog"> <div class="catalog-item" auto-to="function1"><a>第1张</a></div> <div class="catalog-item" auto-to="function2"><a>第2张</a></div> <div class="catalog-item" auto-to="function3"><a>第3张</a></div> </div> <div class="content"> <div menu="function1" class="section" style=‘background-color:green;‘> <h1>第一章</h1> </div> <div menu="function2" class="section" style=‘background-color:yellow;‘> <h1>第二章</h1> </div> <div menu="function3" class="section" style=‘background-color:red;‘> <h1>第三章</h1> </div> </div> </div> </div> <script type="text/javascript" src="jquery-1.8.2.min.js"></script> <script type="text/javascript"> $(function(){ // 自动执行 Init(); }); function Init(){ $(window).scroll(function() { // 监听窗口滚动事件 // 获取滚动条高度 var scrollTop = $(window).scrollTop(); // 当滚动到50像素时,左侧带菜单固定 if(scrollTop > 50){ $(‘.catalog‘).addClass(‘fixed‘); }else{ $(‘.catalog‘).children().removeClass(‘active‘); $(‘.catalog‘).removeClass(‘fixed‘); } // 循环所有的内容 $(‘.content‘).children().each(function(){ // 当前标签距离顶部高度 var offSet = $(this).offset(); // 高度,左边有多远 // offSet.top // offSet.left // 自身高度 var height = $(this).height(); //offSet<滚动高度<offSet+height // 当前内容位于用户阅览区 if(scrollTop>offSet.top && scrollTop< offSet.top + height){ // $(this) 当前内容标签 /* var target = $(this).attr(‘menu‘); $(‘.catalog‘).find(‘div[auto-to="‘+target+‘"]‘).addClass(‘active‘).siblings().removeClass(‘active‘); return false; */ var docHeight = $(document).height(); var winHeight = $(window).height(); // 如果,滚轮到达底部,则显示最后一个菜单 if(docHeight == winHeight+scrollTop) { $(‘.catalog‘).find(‘div:last-child‘).addClass(‘active‘).siblings().removeClass(‘active‘); }else{ var target = $(this).attr(‘menu‘); $(‘.catalog‘).find(‘div[auto-to="‘+target+‘"]‘).addClass(‘active‘).siblings().removeClass(‘active‘); } return false; } }); }); } </script> </body> </html>
总结:
jQuery示例: 表单验证,jQuery扩展 1、回顾基础内容 2、dom事件绑定 3、jquery事件绑定 4、$.each return false 表示break; 5、jquery扩展方法: 两种方式: 6、自定义jQuery扩展的正确方法: a. 自执行 b. 闭包 7、jquery扩展实现基本验证 a. 支持是否允许为空 b. 长度 c. 正则表达式 定义正则表达式 reg = /正则表达式/ ***** g i m ==> 特殊 利用正则匹配 reg.test(字符串) ***** reg.exec(字符串) 全局 非全局 字符串三个方法: search match replace -- 特殊符号 滚动菜单 页面布局(absolute) 监听滚动事件: 如果滚动>60,菜单固定 如果滚动<60,菜单固定取消 前端插件: fontawsome easyui jqueryui bootstrap -- 引入css -- 引入jQuery(2.x,1.12) -- 引入js -- bootstrap模版 bxslider jquery.lazyload
Day17 表单验证、滚动菜单、Django
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